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石家庄铁道学院国防交通研究所参加施工的京广线307号桥换架梁工程是京广线六期提速线路改造的重点工程之一。原桥上部结构为双线17孔32m跨上承式钢板梁,由于上承式钢板梁的刚度不能满足铁路六期提速的需要,故需将其全部更换成钢筋混凝土提速梁。在换架施工方案设计上,先用高架
The Beijing-Guangzhou line No. 307 bridge replacement beam construction participated by the National Defense Traffic Research Institute of Shijiazhuang Railway Institute is one of the key projects of transformation of the sixth phase of Beijing-Guangzhou line. The original structure of the original bridge is a double-line 17-hole 32m span overhang-supported steel plate girder. Since the rigidity of the plate-supported steel plate girder can not meet the need of speeding up of the sixth phase of the railway, it needs to be replaced with a reinforced concrete speed-raising beam. In the replacement of construction program design, the first use of elevated